package com.sky.aspect;

import com.sky.annotion.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.aspectj.lang.Signature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillaspect {
//    切入点
    @Pointcut("execution(* com.sky.mapper.*.*(..))&&@annotation(com.sky.annotion.AutoFill)")
    public void autoFillPointCut() {}
    /*前置通知 在通知中进行公共字段的赋值
    * */
    @Before("autoFillPointCut()")
    public void before(JoinPoint joinPoint) {
        log.info("开始进行公共字段自动填充...");
//        获取当前被拦截的方法上的数据库操作类型
        MethodSignature signature =(MethodSignature) joinPoint.getSignature();
        AutoFill AutoFill=signature.getMethod().getAnnotation(AutoFill.class);
        OperationType OperationType=AutoFill.value();
        final Object[] args = joinPoint.getArgs();
        if (args==null || args.length==0){
            return;
        }
        Object entity= args[0];
//        准备复制数据
        LocalDateTime now = LocalDateTime.now();
        Long currentId= BaseContext.getCurrentId();
//        根据当前不同的操作类型,为对应属性通过反射来赋值
        if (OperationType==OperationType.INSERT){
//            给几个公共字段赋值
            try {
//                Method setCreateTime=org.apache.xmlbeans.impl.piccolo.xml.Entity.class.getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateTime= entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser= entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime =entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser= entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                setCreateTime.invoke(entity, now);
                setCreateUser.invoke(entity, currentId);
                setUpdateTime.invoke(entity, now);
                setUpdateUser.invoke(entity, currentId);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }else if (OperationType==OperationType.UPDATE){
            try {
                Method setUpdateTime =entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser= entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setUpdateTime.invoke(entity, now);
                setUpdateUser.invoke(entity, currentId);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }



    }

}
